mirror of https://gitee.com/openkylin/linux.git
fm10k: future-proof state bitmaps using DECLARE_BITMAP
This ensures that future programmers do not have to remember to re-size the bitmaps due to adding new values. Although this is unlikely for this driver, it may happen and it's best to prevent it from ever being an issue. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jacob Keller
Jeff Kirsher
parent
3ee7b3a3b9
commit
4692955787
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@ -65,14 +65,16 @@ enum fm10k_ring_state_t {
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__FM10K_TX_DETECT_HANG,
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__FM10K_HANG_CHECK_ARMED,
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__FM10K_TX_XPS_INIT_DONE,
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/* This must be last and is used to calculate BITMAP size */
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__FM10K_TX_STATE_SIZE__,
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};
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#define check_for_tx_hang(ring) \
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test_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
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test_bit(__FM10K_TX_DETECT_HANG, (ring)->state)
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#define set_check_for_tx_hang(ring) \
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set_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
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set_bit(__FM10K_TX_DETECT_HANG, (ring)->state)
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#define clear_check_for_tx_hang(ring) \
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clear_bit(__FM10K_TX_DETECT_HANG, &(ring)->state)
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clear_bit(__FM10K_TX_DETECT_HANG, (ring)->state)
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struct fm10k_tx_buffer {
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struct fm10k_tx_desc *next_to_watch;
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@ -126,7 +128,7 @@ struct fm10k_ring {
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struct fm10k_rx_buffer *rx_buffer;
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};
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u32 __iomem *tail;
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unsigned long state;
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DECLARE_BITMAP(state, __FM10K_TX_STATE_SIZE__);
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dma_addr_t dma; /* phys. address of descriptor ring */
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unsigned int size; /* length in bytes */
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@ -266,12 +268,24 @@ enum fm10k_flags_t {
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__FM10K_FLAGS_SIZE__
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};
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enum fm10k_state_t {
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__FM10K_RESETTING,
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__FM10K_DOWN,
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__FM10K_SERVICE_SCHED,
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__FM10K_SERVICE_DISABLE,
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__FM10K_MBX_LOCK,
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__FM10K_LINK_DOWN,
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__FM10K_UPDATING_STATS,
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/* This value must be last and determines the BITMAP size */
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__FM10K_STATE_SIZE__,
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};
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struct fm10k_intfc {
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unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
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struct net_device *netdev;
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struct fm10k_l2_accel *l2_accel; /* pointer to L2 acceleration list */
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struct pci_dev *pdev;
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unsigned long state;
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DECLARE_BITMAP(state, __FM10K_STATE_SIZE__);
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/* Access flag values using atomic *_bit() operations */
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DECLARE_BITMAP(flags, __FM10K_FLAGS_SIZE__);
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@ -367,22 +381,12 @@ struct fm10k_intfc {
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u16 vid;
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};
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enum fm10k_state_t {
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__FM10K_RESETTING,
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__FM10K_DOWN,
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__FM10K_SERVICE_SCHED,
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__FM10K_SERVICE_DISABLE,
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__FM10K_MBX_LOCK,
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__FM10K_LINK_DOWN,
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__FM10K_UPDATING_STATS,
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};
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static inline void fm10k_mbx_lock(struct fm10k_intfc *interface)
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{
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/* busy loop if we cannot obtain the lock as some calls
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* such as ndo_set_rx_mode may be made in atomic context
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*/
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while (test_and_set_bit(__FM10K_MBX_LOCK, &interface->state))
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while (test_and_set_bit(__FM10K_MBX_LOCK, interface->state))
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udelay(20);
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}
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@ -390,12 +394,12 @@ static inline void fm10k_mbx_unlock(struct fm10k_intfc *interface)
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{
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/* flush memory to make sure state is correct */
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smp_mb__before_atomic();
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clear_bit(__FM10K_MBX_LOCK, &interface->state);
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clear_bit(__FM10K_MBX_LOCK, interface->state);
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}
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static inline int fm10k_mbx_trylock(struct fm10k_intfc *interface)
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{
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return !test_and_set_bit(__FM10K_MBX_LOCK, &interface->state);
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return !test_and_set_bit(__FM10K_MBX_LOCK, interface->state);
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}
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/* fm10k_test_staterr - test bits in Rx descriptor status and error fields */
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@ -562,7 +562,7 @@ static int fm10k_set_ringparam(struct net_device *netdev,
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return 0;
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}
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while (test_and_set_bit(__FM10K_RESETTING, &interface->state))
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while (test_and_set_bit(__FM10K_RESETTING, interface->state))
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usleep_range(1000, 2000);
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if (!netif_running(interface->netdev)) {
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@ -648,7 +648,7 @@ static int fm10k_set_ringparam(struct net_device *netdev,
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fm10k_up(interface);
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vfree(temp_ring);
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clear_reset:
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clear_bit(__FM10K_RESETTING, &interface->state);
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clear_bit(__FM10K_RESETTING, interface->state);
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return err;
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}
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@ -1175,13 +1175,13 @@ bool fm10k_check_tx_hang(struct fm10k_ring *tx_ring)
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/* update completed stats and continue */
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tx_ring->tx_stats.tx_done_old = tx_done;
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/* reset the countdown */
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clear_bit(__FM10K_HANG_CHECK_ARMED, &tx_ring->state);
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clear_bit(__FM10K_HANG_CHECK_ARMED, tx_ring->state);
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return false;
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}
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/* make sure it is true for two checks in a row */
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return test_and_set_bit(__FM10K_HANG_CHECK_ARMED, &tx_ring->state);
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return test_and_set_bit(__FM10K_HANG_CHECK_ARMED, tx_ring->state);
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}
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/**
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@ -1191,7 +1191,7 @@ bool fm10k_check_tx_hang(struct fm10k_ring *tx_ring)
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void fm10k_tx_timeout_reset(struct fm10k_intfc *interface)
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{
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/* Do the reset outside of interrupt context */
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if (!test_bit(__FM10K_DOWN, &interface->state)) {
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if (!test_bit(__FM10K_DOWN, interface->state)) {
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interface->tx_timeout_count++;
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set_bit(FM10K_FLAG_RESET_REQUESTED, interface->flags);
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fm10k_service_event_schedule(interface);
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@ -1214,7 +1214,7 @@ static bool fm10k_clean_tx_irq(struct fm10k_q_vector *q_vector,
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unsigned int budget = q_vector->tx.work_limit;
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unsigned int i = tx_ring->next_to_clean;
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if (test_bit(__FM10K_DOWN, &interface->state))
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if (test_bit(__FM10K_DOWN, interface->state))
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return true;
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tx_buffer = &tx_ring->tx_buffer[i];
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@ -1344,7 +1344,7 @@ static bool fm10k_clean_tx_irq(struct fm10k_q_vector *q_vector,
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smp_mb();
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if (__netif_subqueue_stopped(tx_ring->netdev,
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tx_ring->queue_index) &&
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!test_bit(__FM10K_DOWN, &interface->state)) {
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!test_bit(__FM10K_DOWN, interface->state)) {
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netif_wake_subqueue(tx_ring->netdev,
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tx_ring->queue_index);
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++tx_ring->tx_stats.restart_queue;
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@ -822,7 +822,7 @@ static int fm10k_update_vid(struct net_device *netdev, u16 vid, bool set)
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/* Do not throw an error if the interface is down. We will sync once
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* we come up
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*/
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if (test_bit(__FM10K_DOWN, &interface->state))
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if (test_bit(__FM10K_DOWN, interface->state))
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return 0;
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fm10k_mbx_lock(interface);
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@ -93,18 +93,18 @@ static int fm10k_hw_ready(struct fm10k_intfc *interface)
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void fm10k_service_event_schedule(struct fm10k_intfc *interface)
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{
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if (!test_bit(__FM10K_SERVICE_DISABLE, &interface->state) &&
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!test_and_set_bit(__FM10K_SERVICE_SCHED, &interface->state))
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if (!test_bit(__FM10K_SERVICE_DISABLE, interface->state) &&
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!test_and_set_bit(__FM10K_SERVICE_SCHED, interface->state))
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queue_work(fm10k_workqueue, &interface->service_task);
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}
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static void fm10k_service_event_complete(struct fm10k_intfc *interface)
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{
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WARN_ON(!test_bit(__FM10K_SERVICE_SCHED, &interface->state));
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WARN_ON(!test_bit(__FM10K_SERVICE_SCHED, interface->state));
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/* flush memory to make sure state is correct before next watchog */
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smp_mb__before_atomic();
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clear_bit(__FM10K_SERVICE_SCHED, &interface->state);
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clear_bit(__FM10K_SERVICE_SCHED, interface->state);
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}
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/**
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@ -159,7 +159,7 @@ static void fm10k_prepare_for_reset(struct fm10k_intfc *interface)
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/* put off any impending NetWatchDogTimeout */
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netif_trans_update(netdev);
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while (test_and_set_bit(__FM10K_RESETTING, &interface->state))
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while (test_and_set_bit(__FM10K_RESETTING, interface->state))
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usleep_range(1000, 2000);
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rtnl_lock();
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@ -242,7 +242,7 @@ static int fm10k_handle_reset(struct fm10k_intfc *interface)
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rtnl_unlock();
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clear_bit(__FM10K_RESETTING, &interface->state);
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clear_bit(__FM10K_RESETTING, interface->state);
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return err;
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err_open:
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@ -254,7 +254,7 @@ static int fm10k_handle_reset(struct fm10k_intfc *interface)
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rtnl_unlock();
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clear_bit(__FM10K_RESETTING, &interface->state);
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clear_bit(__FM10K_RESETTING, interface->state);
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return err;
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}
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@ -316,11 +316,11 @@ static void fm10k_watchdog_update_host_state(struct fm10k_intfc *interface)
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struct fm10k_hw *hw = &interface->hw;
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s32 err;
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if (test_bit(__FM10K_LINK_DOWN, &interface->state)) {
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if (test_bit(__FM10K_LINK_DOWN, interface->state)) {
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interface->host_ready = false;
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if (time_is_after_jiffies(interface->link_down_event))
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return;
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clear_bit(__FM10K_LINK_DOWN, &interface->state);
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clear_bit(__FM10K_LINK_DOWN, interface->state);
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}
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if (test_bit(FM10K_FLAG_SWPRI_CONFIG, interface->flags)) {
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@ -411,7 +411,7 @@ void fm10k_update_stats(struct fm10k_intfc *interface)
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int i;
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/* ensure only one thread updates stats at a time */
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if (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state))
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if (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
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return;
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/* do not allow stats update via service task for next second */
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@ -492,7 +492,7 @@ void fm10k_update_stats(struct fm10k_intfc *interface)
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net_stats->rx_errors = rx_errors;
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net_stats->rx_dropped = interface->stats.nodesc_drop.count;
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clear_bit(__FM10K_UPDATING_STATS, &interface->state);
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clear_bit(__FM10K_UPDATING_STATS, interface->state);
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}
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/**
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@ -532,8 +532,8 @@ static void fm10k_watchdog_flush_tx(struct fm10k_intfc *interface)
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static void fm10k_watchdog_subtask(struct fm10k_intfc *interface)
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{
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/* if interface is down do nothing */
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if (test_bit(__FM10K_DOWN, &interface->state) ||
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test_bit(__FM10K_RESETTING, &interface->state))
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if (test_bit(__FM10K_DOWN, interface->state) ||
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test_bit(__FM10K_RESETTING, interface->state))
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return;
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if (interface->host_ready)
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@ -563,8 +563,8 @@ static void fm10k_check_hang_subtask(struct fm10k_intfc *interface)
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int i;
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/* If we're down or resetting, just bail */
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if (test_bit(__FM10K_DOWN, &interface->state) ||
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test_bit(__FM10K_RESETTING, &interface->state))
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if (test_bit(__FM10K_DOWN, interface->state) ||
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test_bit(__FM10K_RESETTING, interface->state))
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return;
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/* rate limit tx hang checks to only once every 2 seconds */
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@ -663,7 +663,7 @@ static void fm10k_configure_tx_ring(struct fm10k_intfc *interface,
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FM10K_PFVTCTL_FTAG_DESC_ENABLE);
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/* Initialize XPS */
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if (!test_and_set_bit(__FM10K_TX_XPS_INIT_DONE, &ring->state) &&
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if (!test_and_set_bit(__FM10K_TX_XPS_INIT_DONE, ring->state) &&
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ring->q_vector)
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netif_set_xps_queue(ring->netdev,
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&ring->q_vector->affinity_mask,
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@ -980,7 +980,7 @@ void fm10k_netpoll(struct net_device *netdev)
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int i;
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/* if interface is down do nothing */
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if (test_bit(__FM10K_DOWN, &interface->state))
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if (test_bit(__FM10K_DOWN, interface->state))
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return;
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for (i = 0; i < interface->num_q_vectors; i++)
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@ -1173,7 +1173,7 @@ static irqreturn_t fm10k_msix_mbx_pf(int __always_unused irq, void *data)
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if (eicr & FM10K_EICR_SWITCHNOTREADY) {
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/* force link down for at least 4 seconds */
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interface->link_down_event = jiffies + (4 * HZ);
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set_bit(__FM10K_LINK_DOWN, &interface->state);
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set_bit(__FM10K_LINK_DOWN, interface->state);
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/* reset dglort_map back to no config */
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hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
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@ -1325,7 +1325,7 @@ static s32 fm10k_lport_map(struct fm10k_hw *hw, u32 **results,
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if (!err && hw->swapi.status) {
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/* force link down for a reasonable delay */
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interface->link_down_event = jiffies + (2 * HZ);
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set_bit(__FM10K_LINK_DOWN, &interface->state);
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set_bit(__FM10K_LINK_DOWN, interface->state);
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/* reset dglort_map back to no config */
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hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;
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@ -1623,10 +1623,10 @@ void fm10k_up(struct fm10k_intfc *interface)
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hw->mac.ops.update_int_moderator(hw);
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/* enable statistics capture again */
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clear_bit(__FM10K_UPDATING_STATS, &interface->state);
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clear_bit(__FM10K_UPDATING_STATS, interface->state);
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/* clear down bit to indicate we are ready to go */
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clear_bit(__FM10K_DOWN, &interface->state);
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clear_bit(__FM10K_DOWN, interface->state);
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/* enable polling cleanups */
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fm10k_napi_enable_all(interface);
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@ -1660,7 +1660,7 @@ void fm10k_down(struct fm10k_intfc *interface)
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int err, i = 0, count = 0;
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/* signal that we are down to the interrupt handler and service task */
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if (test_and_set_bit(__FM10K_DOWN, &interface->state))
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if (test_and_set_bit(__FM10K_DOWN, interface->state))
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return;
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/* call carrier off first to avoid false dev_watchdog timeouts */
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@ -1680,7 +1680,7 @@ void fm10k_down(struct fm10k_intfc *interface)
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fm10k_update_stats(interface);
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/* prevent updating statistics while we're down */
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while (test_and_set_bit(__FM10K_UPDATING_STATS, &interface->state))
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while (test_and_set_bit(__FM10K_UPDATING_STATS, interface->state))
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usleep_range(1000, 2000);
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/* skip waiting for TX DMA if we lost PCIe link */
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@ -1849,8 +1849,8 @@ static int fm10k_sw_init(struct fm10k_intfc *interface,
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memcpy(interface->rssrk, rss_key, sizeof(rss_key));
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/* Start off interface as being down */
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set_bit(__FM10K_DOWN, &interface->state);
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set_bit(__FM10K_UPDATING_STATS, &interface->state);
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set_bit(__FM10K_DOWN, interface->state);
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set_bit(__FM10K_UPDATING_STATS, interface->state);
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return 0;
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}
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@ -2027,7 +2027,7 @@ static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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* must ensure it is disabled since we haven't yet requested the timer
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* or work item.
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*/
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set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
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set_bit(__FM10K_SERVICE_DISABLE, interface->state);
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err = fm10k_mbx_request_irq(interface);
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if (err)
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@ -2068,7 +2068,7 @@ static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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fm10k_iov_configure(pdev, 0);
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/* clear the service task disable bit to allow service task to start */
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clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
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clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
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return 0;
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@ -2106,7 +2106,7 @@ static void fm10k_remove(struct pci_dev *pdev)
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del_timer_sync(&interface->service_timer);
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set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
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set_bit(__FM10K_SERVICE_DISABLE, interface->state);
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cancel_work_sync(&interface->service_task);
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/* free netdev, this may bounce the interrupts due to setup_tc */
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@ -2145,7 +2145,7 @@ static void fm10k_prepare_suspend(struct fm10k_intfc *interface)
|
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* stopped. We stop the watchdog task until after we resume software
|
||||
* activity.
|
||||
*/
|
||||
set_bit(__FM10K_SERVICE_DISABLE, &interface->state);
|
||||
set_bit(__FM10K_SERVICE_DISABLE, interface->state);
|
||||
cancel_work_sync(&interface->service_task);
|
||||
|
||||
fm10k_prepare_for_reset(interface);
|
||||
|
|
@ -2171,10 +2171,10 @@ static int fm10k_handle_resume(struct fm10k_intfc *interface)
|
|||
|
||||
/* force link to stay down for a second to prevent link flutter */
|
||||
interface->link_down_event = jiffies + (HZ);
|
||||
set_bit(__FM10K_LINK_DOWN, &interface->state);
|
||||
set_bit(__FM10K_LINK_DOWN, interface->state);
|
||||
|
||||
/* clear the service task disable bit to allow service task to start */
|
||||
clear_bit(__FM10K_SERVICE_DISABLE, &interface->state);
|
||||
clear_bit(__FM10K_SERVICE_DISABLE, interface->state);
|
||||
fm10k_service_event_schedule(interface);
|
||||
|
||||
return err;
|
||||
|
|
|
|||
Loading…
Reference in New Issue